I migrated from CentOS 5.6 to Scientific Linux (may be a bit risky, but did it anyway). Works great so far.
Noticed a few minor issues when I restored my virtualmin domains. But otherwise worked great. Enjoying SNI without mod_gnut tls now :-)
- Bind didn't work and needed a few adjustments, like rndc, remove allow-query and a couple of other small things (basically compared old and new config and fixed settings).
- System logs module in webmin doesn't work
- Deleting an Alias Domain did not remove the corresponding zone entry
I also see the following Postfix warnig messages now:
doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:21: protocols=imaps is no longer necessary, remove it doveconf: Warning: Obsolete setting in /etc/dovecot/dovecot.conf:21: protocols=pop3s is no longer necessary, remove it